JP4384461B2 - Inner lid for heat insulation of ceiling inspection port - Google Patents

Description

  The present invention relates to an inner lid for heat insulation of an inspection port provided on a ceiling of a building such as a house.

  The ceiling of the house is provided with an inspection opening large enough for people to enter and exit, and an openable / closable lid is attached to the inspection opening. However, with such a single outer lid alone, the heat retaining property is insufficient, and the warm air in the room easily escapes. In general, a double structure is used for heat insulation. This heat insulating inner lid is usually made of foamed synthetic resin and is lightweight but has a considerable thickness and is detachably attached to the inner side of the outer lid. Conventionally, for the attachment / detachment locking of the inner lid, hook-shaped bar members are attached to the two opposite portions of the edge, and the bar member is slid to protrude and retract to the side of the inner lid. A method of hanging on a frame material has been proposed (see, for example, Patent Document 1).

JP 2001-140460 A

  However, the conventional bowl-shaped bar member is provided in two places, and it is necessary to perform the protrusion and disengagement operation separately. Therefore, the mounting / dismounting operation is troublesome, and it is fixedly held in the locked state. There is also a problem that the inner lid falls off carelessly due to insufficient force.

  In view of the above, the present invention provides a heat insulating inner lid for a ceiling inspection port that is easy to attach and detach when the lid is opened and closed, and is sufficiently fixed and held in the attached state. It is another object of the present invention to provide an inner cover for heat insulation that is entirely made of a heat insulating material, has high heat insulation and heat retention, has a simple structure, and can be implemented at low cost.

  The technical means of the inner lid for heat insulation of the present invention comprises a frame member made of foam material fixedly installed inside the inspection opening of the ceiling, and an inner lid detachably fitted to the inner surface of the frame member. The inner lid is entirely made of foam material, and a groove is formed in the bottom plate, and an opening / closing operation body made of foamed elastic material is mounted in the groove, and a handle is attached to the center of the opening / closing operation body. There is a boss part that is pivotably positioned in the groove, and this boss part has a plurality of arm parts, and a protruding and engaging part is provided at the tip of the arm part. When the is rotated, the arm part is deformed, and the protruding and engaging part protrudes and protrudes from the side surface of the inner lid, and is engaged with and disengaged from the locking part provided on the inner surface of the frame member.

  The opening / closing operation body is preferably made of a foamed synthetic resin elastic material.

  The heat insulating inner lid of the present invention is separately attached to the inside of the outer cover of the ceiling inspection port, and the inner cover is entirely made of foam. Can improve the performance. Furthermore, the operation at the time of attaching and detaching the inner lid has a handle at the center of the opening / closing operation body, rotates it, immerses the intrusion engaging part on both sides, and disengages it from the locking part of the frame material, Remove the inner lid. Therefore, the handle can be held and the load on the inner lid can be supported while being rotated, and the operation of attaching / detaching the inner lid can be easily performed by one operator. Further, since the holding of the inner lid is held by the elastic force of the opening / closing operation body, the inner lid is not easily detached and the inner lid can be prevented from being accidentally dropped off. Furthermore, the present invention has advantages such as simple construction and low cost implementation.

  According to the second aspect, since the opening / closing operation body is made of a foamed synthetic resin elastic material, it has sufficient elastic force, strength and durability, and is practically sufficient.

  The best mode for carrying out the heat insulating inner lid of the present invention will be described based on the embodiments of the drawings. FIG. 1 is a cross-sectional view of the mounting state, where 1 is a ceiling plate and 2 is an inspection port provided in a part of the ceiling surface. A suitable outer lid 3 is attached to the inspection port 2 so as to be freely opened and closed. Reference numeral 4 denotes an inner lid, which is attached to the inner side of the outer lid 3. Reference numeral 5 denotes a frame member for holding the inner lid 4, which is fixedly installed inside the inspection port 2. The inner lid 4 and the frame member 5 are all made of foamed synthetic resin and have high heat insulation and heat retention.

  The inner lid 4 is a thick block body having a configuration in which a core material 12 made of foamed polystyrene resin is filled inside the box body 11. In the embodiment, the length × width × thickness is 450 × 450 × 225 mm. The box 11 has a bottom plate 13, and an opening / closing operation body 14 is provided inside thereof. In addition, the material of the box 11 is made of a polymer of a foamed polyethylene resin and a foamed polystyrene resin, including the lower surface plate 13, and has a higher strength than the core material 12.

  As shown in FIG. 2, a groove 15 is formed inside the lower surface plate 13, and the opening / closing operation body 14 is fitted into the groove 15. The opening / closing operation body 14 is made of a foamed polyethylene resin, and has elasticity and constant strength. The opening / closing operation body 14 has a boss portion 16 at the center, and is rotatably provided in the groove 15 of the lower surface plate 13. Reference numeral 17 denotes a handle for rotating. Two arm portions 18 extend from the boss portion 16, and a protruding and engaging portion 19 is attached to the tip thereof. Therefore, if the opening / closing operation body 14 is rotated with the handle 17, the arm 18 is bent and deformed by its elasticity, and the retracting engagement portion 19 is retracted from the side of the inner lid 4. When the handle 17 is released, the deformation of the arm 18 is restored by the elastic restoring force, and the protruding and engaging portion 19 protrudes again from the side of the inner lid 4. The groove 15 and the opening / closing operation body 14 are wide enough to be deformed.

  The frame material 5 is provided so as to surround the four circumferences of the inner lid 4. Further, the frame member 5 and the inner lid 4 are formed so that almost no gap is formed, and the inner lid 4 can be freely inserted and removed. A locking portion 21 is formed on the inner surface of the frame member 5 and engages with each other when the projecting / engaging engagement portion 19 of the inner lid 4 protrudes. The material of the frame member 5 is made of a polymer of a foamed polyethylene resin and a foamed polystyrene resin.

  As described above, the heat insulating inner lid 4 is attached to the inside of the inspection port 2 on the ceiling separately from the outer lid 3. In addition, since the inner lid 4 and the frame member 5 are entirely made of foamed synthetic resin and have high heat insulation properties, the inspection port 2 can be completely insulated and shielded, and the escape of warm air from the inspection port can be prevented. The heat retention can be improved. Further, the attachment / detachment of the inner lid 4 is performed by rotating the handle 17 to elastically deform the opening / closing operation body 14, causing the indentation engaging portion 19 to indent / invade from the side surface of the inner lid 4, and locking the frame member 5. Since it is engaged with and disengaged from the portion 21, the operation is simple and the operation is reliable, and the protrusions on both sides can be moved by turning the handle at one central position, so the handle supports the load on the inner lid 4. Thus, one person can easily attach and detach the inner lid 4. In addition, the inner lid 4 is fixed only by hooking the protruding / engaging engagement portion 19 to the locking portion 21 of the frame member 5, but the inner lid 4 is relatively lightweight, so that the supporting force is sufficient. Further, the fixed holding is based on the elastic force of the opening / closing operation body 14, and since the force is always applied to the protruding / engaging engagement portion 19 in the protruding direction, the engagement is not easily disengaged. 4 can be prevented from falling off carelessly.

  The present invention is not limited to the above-described embodiments, and can be freely modified within the scope of the claims. In particular, the material of the foam of the inner lid and the frame material is free, and the shape and material of the opening / closing operation body are also free.

Sectional drawing of the attachment state of the inner lid | cover for heat insulation of this invention. The top view which shows the engagement relationship of an opening / closing operation body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceiling board 2 Inspection port 3 Outer cover 4 Middle cover 5 Frame material 11 Box body 12 Core material 13 Lower surface board 14 Opening / closing operation body 15 Groove 16 Boss part 17 Handle 18 Arm part 19 Retracting engagement part 21 Locking part

Claims (2)

It consists of a foam frame that is fixedly installed inside the ceiling inspection port, and an inner lid that is detachably fitted to the inner surface of the frame. A groove is formed in the face plate, and an opening / closing operation body made of foamed elastic material is attached in this groove, and there is a boss part with a handle at the center of this opening / closing operation body, and it can rotate freely in the groove This boss part has a plurality of arm parts, and a protrusion engagement part is provided at the tip of the arm part. When the boss part is rotated, the arm part is deformed and appears An insulative inner lid for a ceiling inspection port in which an engaging portion protrudes and protrudes from a side surface of the inner lid and engages with and disengages from a locking portion provided on an inner surface of the frame member. The ceiling lid for heat insulation of a ceiling inspection opening according to claim 1, wherein the opening / closing operation body is made of a foamed synthetic resin elastic material.